Tredmill or Treadmill: How To spell?

The word Tredmill is misspelled against Treadmill, a noun meaning "A mill worked by persons treading upon steps on the periphery of a wide wheel having a horizontal axis. It is used principally as a means of prison discipline. Also, a mill worked by horses, dogs, etc., treading an endless belt."

Treadmill has vowels 'ea' together mispronounced as 'e'
Word contains consecutive vowels 'EA' in between alphabets tr & dmill is misspelled as 'E'
Wrong Spelling:  tr-e-dmill 
Correct Spelling:  tr-ea-dmill 
Find more wrongly spelled words of Treadmill to spell it well.

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